I'm not sure which is faster, checking the validity of a message and then

just

pass it through, or recomposing it before sending it along.

Actually, theyre probably both negligible compared to actually doing the
sending of the result. The actual sending/handling of each outgoing
datachunk will be n times more important than how you treat incoming
broadcast messages, where n is the number of users.

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John Bäckstranmd